Open main menu

Page:Popular Science Monthly Volume 90.djvu/232

This page needs to be proofread.


216

��Popular Science Monthly

��An Electrical Wind Waves this American Flag on its Pole

THE sight of a Hag waving from its staff in a seemingly quiet at- mosphere in Atlantic City recently puzzled everyone who saw it. Only after a careful examination of the flag and the pole did it become apparent that the pole was really blowing the flag.

The pole was a metal tube twenty-seven feet high and five inches in diameter at the top and nine inches at the bottom. It was set over the ex- haust port of an electric motor-driven blower, hidden from view by foliage. For a distance of nine feet from the top, the pole was perforated with two rows of holes drilled close together. With the blower in opera- tion it was the blasts emitted through these holes that held the flag and imparted to it the waving motion shown in the illustration.

A Simple Method for Pasteurizing Milk

ONE of the most important contributions from the medical profession has been the simple process of pasteurization. We can only realize what it has meant when we consider that of all the dairy cows in the United States, forty per cent have tuberculosis. It is therefore evidently very important that every bottle be pasteurized before being used ; and if that has not been done by the dealer, it can be effected without much trouble in the following way: The bottles are placed in a wire basket and slowly heated in a vessel of water to just boiling. Here they are left for five minutes; then they are again cooled by allowing cold water to run into the vessel. The bottles must then be stored at a temperature of not more than fifty degrees Fahren- heit. If the temperature should be just about fifty degrees, wet woolen cloths will lower it enough.

���The pole blows the flag whether there is any air stirring or not. The effect is the same even indoors

��You Can See Your Gasoline in This Service Station

ANEW departure in gas- oline service stations for automobilists has been invented by Henry E. Maurer, of Springfield, Illinois. The patented device includes a system for the accurate measure- ment and dispensing of gasoline which allows the motorist to see the gas- oline that he is receiving. Furthermore the dealer does not have to turn the crank of his pump as each gallon is measured out. 1 he entire apparatus is operated by the vacuum process and eliminates any possibility of mistake in giving an accurate measurement.

When the motorist drives up to the station he receives his gas from two five-gallon glass tanks. These tanks are marked with gages that are inspected at intervals and sealed by the in- spector. As the gasoline flows out of the glass receptacle the motorist is given a chance to see exactly what and how much he is getting. The flow is automatic.

by opening to the jar. other fills.

��The gasoline is released a valve, which admits air Whileone jaremptiesthe

���There is no guesswork in measuring your gasoline with this device. You can see for yourself by watching the gages how much you are getting

�� �